I have had this new 6.6 L Turbo Diesel with an Alisson Trans. for about 2 weeks. How long should I wait to break it in before I put the Programer/Chip on? Also what is the best programer/chip out there for this truck Thanks Alot for your help.

Welcome to the forum Acady.

If you look through this forum, you will find this question asked and responded to daily. Also take a look at the LBZ Electronics Forum or the LLY Electronics Forum, depending on which 6.6 motor you have.